Thermal compatibility evaluation of veneering ceramic over zirconia: Evaluation of Thermal Compatibility of VITA VM 9 Veneering Ceramic Over VITA In-Ceram Zirconia Framework - Couverture souple

Fadilaldin, Fatien

Couverture souple

ISBN 10 : 3330967463 ISBN 13 : 9783330967465

Editeur : Noor Publishing, 2017

Synopsis

The residual stresses generated during manufacturing of zirconia prostheses is the origin of unstable chipping observed clinically. The aim of this study was to analyzing the influence of porcelain thickness and the implemented cooling protocol on the magnitude of the developed residual stresses. 60 rectangular bilayered plates and thermal shock test were used to investigate the propensity for chipping, and to show the thermal residual stress resistance of the structure. Two different thickness ratios of 1:1and 1:2 mm, either rapidly or slowly cooled from sintering temperature to Tg were tested. The results demonstrated that the tested VITA VM 9 veneering ceramic and VITA In-Ceram combination had a lowest thermal shock resistance of 120 oC, with no significant differences emerging between the groups (P>0.05). In addition, 100% of the samples failed cohesively and no delamination were identified. The tested system showed adequate thermal shock resistance, however with the most failed samples showed horizontal crack propagation that probably driven by compressive stresses provides a motive toward investigating a perfect TEC matching concept between the core and the veneering ceramic.

Détails de l'édition

• Éditeur: Noor Publishing
• Date d'édition: 2017
• Langue: anglais
• ISBN 10: 3330967463
• ISBN 13: 9783330967465
• Reliure: Broché
• Nombre de pages: 88
• Coordonnées du fabricant: non disponible
• Personne responsable: non disponible